The 2018 Moscow mayoral election was held on 9 September 2018, on common election day. To be elected, a candidate must get more than 50% of votes. If no one achieves 50%, a runoff will be held 14 days later. Only the two most successful candidates from the first round participate in the second round.

Sergey Sobyanin, the incumbent Mayor of Moscow, was re-elected for a new term.

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Candidates can be nominated both by political parties and as self-nomination.

In any case, candidates must pass the "municipal filter" (collection of signatures of municipal deputies). According to the decision of Moscow City Election Commission from 4 June 2018, the number of signatures of municipal deputies in support of a candidate must be in the range of from 110 to 115.[2]

Candidates nominated by the self-nomination procedure, in addition to the signatures of municipal deputies, it is also necessary to collect signatures of voters. The number of signatures of voters should be in the range from 36,081 to 39,689.

Initially, four candidates were registered to participate in the election, but on 23 July, the Moscow City Court ordered the City Election Commission to register one more candidate.[3][4] Thus, five candidates were registered to participate in the election.

^Initially, Mikhail Balakin collected the required number of signatures of municipal deputies, but later three deputies withdrew their signatures, and registration was denied due to lack of signatures of municipal deputies, but on 23 July, the Moscow City Court declared the refusal illegal, since initially there were enough signatures and ordered to the City Election Commission to register Balakin as mayoral candidate.